Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
Which is the part of an experiment that serves as the point of comparison for
the results?
a. | hypothesis | c. | constant | b. | independent variable | d. | control |
|
|
|
2.
|
These three solid blocks are made of the same material and have the exact same
dimensions. Which block has the greatest mass?
a. | Block A | c. | Block C | b. | Block B | d. | They all have the same
mass |
|
|
|
3.
|
Which is a value that should remain constant for all samples in this
experiment?
a. | Amount of salt added | c. | Boiling temperature | b. | Volume of water | d. | Time required for water to
boil |
|
|
|
4.
|
Which is the part of the experiment that the researcher manipulates?
a. | independent variable | c. | control | b. | constants | d. | dependent
variable |
|
|
|
5.
|
A person is traveling by an airplane 10 km above ground level. What is the
impact on the person’s mass and weight compared to that at ground level?
a. | Mass increases, weight decreases | b. | Mass decreases, weight
decreases | c. | Mass remains the same, weight decreases | d. | Mass and weight
remains the same |
|
|
|
6.
|
Which of the following properties of matter can be explained on a submicroscopic
level?
a. | Structure | c. | Behavior | b. | Composition | d. | All the above |
|
|
|
7.
|
Which of the following is qualitative data?
a. | Color | c. | Temperature | b. | Pressure | d. | Volume |
|
|
|
8.
|
Which of the following is quantitative data?
a. | Color | c. | Shape | b. | Odor | d. | Volume |
|
|
|
9.
|
Which is the term used for the measurement of the average kinetic energy of the
particles of a substance?
a. | density | c. | length | b. | temperature | d. | mass |
|
|
|
10.
|
Which term is described as the amount of matter in an object?
a. | density | c. | mass | b. | volume | d. | length |
|
|
|
11.
|
Which is NOT an appropriate unit for measuring density?
|
|
|
12.
|
Which term describes the amount of mass contained per unit volume?
a. | mass | c. | length | b. | temperature | d. | density |
|
|
|
13.
|
Which value has only 4 significant digits?
a. | 6.930 | c. | 8450 | b. | 0.0450 | d. | 0.392 |
|
|
|
14.
|
Which is the product of these numbers, to the appropriate number of significant
digits?
56.2 ´ 9.2057 =
a. | 517 | c. | 517.36 | b. | 517.4 | d. | 517.00 |
|
|
|
15.
|
How many significant digits are in the value 530,405,000?
|
|
|
16.
|
How many significant digits are in the value 0.0050340?
|
|
|
17.
|
A bottle contains 3.100 mL of a liquid. The total mass of the bottle and the
liquid together is 6.300 g. The mass of the empty bottle is 4.240 g. What is the density of the
liquid?
a. | 0.665 g/mL | c. | 1.505 g/mL | b. | 1.368 g/mL | d. | 2.032 g/mL |
|
|
|
18.
|
The product of 2 ´ 104 cm and 4 ´ 10–12 cm, expressed in scientific notation is
____.
a. | 8 ´ 10–7 cm | c. | 8 ´ 10–8 cm | b. | 6 ´
10–8 cm | d. | 8
´ 10–48 cm |
|
|
|
19.
|
Which is the state of matter that has an indefinite shape and definite
volume?
a. | solid | c. | gas | b. | liquid | d. | plasma |
|
|
|
20.
|
Which is an extensive physical property?
a. | color | c. | density | b. | length | d. | boiling point |
|
|
|
21.
|
Which is an intensive physical property?
a. | color | c. | length | b. | mass | d. | volume |
|
|
|
22.
|
What is the change of state in which a solid becomes a liquid?
a. | liquefaction | c. | condensation | b. | melting | d. | sublimation |
|
|
|
23.
|
What is the change of state in which a gas becomes a liquid?
a. | sublimation | c. | condensation | b. | freezing | d. | melting |
|
|
|
24.
|
How many individual atoms make up one unit of aluminum chloride,
AlCl3?
|
|
|
25.
|
Which is an example of a homogeneous mixture?
a. | sand | c. | vegetable soup | b. | clean air | d. | fresh-squeezed orange
juice |
|
|
|
26.
|
Which is the separation technique that relies on the different boiling points of
the parts of the mixture?
a. | filtration | c. | chromatography | b. | distillation | d. | crystallization |
|
|
|
27.
|
Which is a compound?
a. | sodium | c. | carbon dioxide | b. | sea water | d. | brass |
|
|
|
28.
|
According to the Law of Conservation of Mass, in any chemical change
a. | the mass of reactants is greater than the mass of products | b. | the mass of
reactants is less than the mass of products | c. | the mass of reactants is equal to the mass of
products | d. | the masses of products and reactants have no predictable
relationship |
|
|
|
29.
|
Which is a chemical property of copper?
a. | has a boiling point of 2567 °C | b. | reacts in air to form a green
layer | c. | has the symbol Cu | d. | is a solid at room
temperature |
|
|
|
30.
|
Matter that has a uniform and unchanging composition is known as a(n)
____.
a. | compound | c. | mixture | b. | element | d. | substance |
|
|
|
31.
|
Which of the following substances is an element?
a. | Baking soda | c. | Salt | b. | Iron | d. | Sugar |
|
|
|
32.
|
Elemental bromine occurs in the ____ state at room temperature.
a. | gaseous | c. | plasma | b. | liquid | d. | solid |
|
|
|
33.
|
Which one is comprised of the other three?
a. | proton | c. | electron | b. | atom | d. | neutron |
|
|
|
34.
|
Which has a charge of +1?
a. | proton | c. | electron | b. | atom | d. | neutron |
|
|
|
35.
|
Which one(s) have a mass of 1 amu?
a. | electron | c. | proton and neutron | b. | proton | d. | electron and
proton |
|
|
|
36.
|
Which is the smallest part of an element that retains all the properties of the
element?
a. | proton | c. | electron | b. | neutron | d. | atom |
|
|
|
37.
|
How many neutrons are in an atom of chlorine?
|
|
|
38.
|
Which is the correct symbol for the atom with 42 protons and 49 neutrons?
|
|
|
39.
|
Which is the number of neutrons in  ?
|
|
|
40.
|
Which element has 14 protons?
a. | Nitrogen | c. | Aluminum | b. | Silicon | d. | Sulfur |
|
|
|
41.
|
Which scientist measured the charge on an electron as 1.602 ´ 10-19 Coulombs?
a. | Democritus | c. | Rutherford | b. | Millikan | d. | Bohr |
|
|
|
42.
|
According to the modern concept of the atom, which are located in the nucleus of
an atom?
a. | electrons and protons | c. | neutrons and electrons | b. | protons
only | d. | protons and
neutrons |
|
|
|
43.
|
An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for
this atom?
|
|
|
44.
|
Which is the correct number of valence electrons in the element Sulfur
(S)?
|
|
|
45.
|
Which element has the electron configuration
1s22s22p63s23p64s13d5?
a. | Titanium (Ti) | c. | Sulfur (S) | b. | Chromium (Cr) | d. | Selenium (Se) |
|
|
|
46.
|
Which is the correct electron configuration for the element Molybdenum
(Mo)?
a. | 1s22s22p63s23p64s23d4 | c. | 1s22s22p63s23p64s24d104p65s25d4 | b. | 1s22s22p63s23p64s23d104p65s6 | d. | 1s22s22p63s23p64s23d104p65s24d4 |
|
|
|
47.
|
Use Plank’s constant, 6.626 ´
10-34, to solve the following:
What is the amount of energy carried by a photon that
has a frequency of 5.71 ´ 1014 Hz?
a. | 525 nm | c. | 1.14 ´ 10-8
J | b. | 3.78 ´ 10-19 J | d. | 8.62 ´
1047 J/s |
|
|
|
48.
|
A photon is emitted from an atom with an energy of 4.25 ´ 10-19 J. What is the wavelength of the photon?
a. | 468 nm | c. | 1.28 ´ 10-10
m | b. | 2.73 ´ 10-4 m | d. | 6.42 ´
1014 m |
|
|
|
49.
|
Which is the halogen that is in Period 5?
a. | Bromine (Br) | c. | Iodine (I) | b. | Strontium (Sr) | d. | Xenon (Xe) |
|
|
|
50.
|
Which is the charge that results when oxygen becomes an ion?
|
|
|
51.
|
Which is the correct name for the compound CoCO3?
a. | Carbon Oxygen Carbonate | c. | Cobalt
Carbonate | b. | Cobalt (II) Carbonate | d. | Cobalt Carbonoxide |
|